Bull hook



O. A. Wl'R-K'KALA BULL HOOK Filed July 16, 1924 Fig. 1' I -May 5, .1925.

Fig. 2

INVENTOR, mm a. wufmza.

BY am 6. saw I A TTORNEY.

Patented Ma y ,5, 1925.

UNITED STATES OSCAR A. wmnxata, or. Kane, wasirrneron.

Application filerl July 16,

To all whom it may concern: a

Be it known that I, OSCAR A. liunnana, a citizen of the United States,and a resident of Kent, in the county of -King and State of Vaslnngton,have lnventeda new and useful Bull Hook, or which thefollowing is aspecification.

My invention relates to improvements in bull hooks, more especially thekind used. in

heavy logging, and one of the objects of my improvements is .to providea bull hook which is engageable and disengageable with the service cablewithout requiring more slack therein than is needed to relieve thetension therefrom. Another objectof my improvements is toprovide a bullhook that is connectedto the hauling cable and to the service cablewithout the usual eyes spliced in the ends of said cables. Anotherobject of my improvements is to provide a bull hook having swivelconnections with both the hauling and servicecables. Another object ofmy improvements is to provide a bull hook that makes a positiveengagement with the service cable. Another object of my improvements isto provide a positive hook having keeper mechanism disposed in amannorto protect it from injury during hook operations yet readilyaccessiblefor oper ative changes. And a further object of my improvements is toprovide a bull hookdesigned for casting in steel with-a distribution ofthe metal advantageous for strength and lightness, and smoothness ofcontour and compactness.

I attain these objects with the mechanism illustrated in theaccompanying sheet of drawings in which Figure 1 is a top plan view ofmy hook, Fig. 2 is a front elevation;

Fig. 3 is a bottom plan view of Fig. 2 and' Fig. i is a side elevationofFig. 2.

Similar characters refer to similar parts throughout. Certain parts arebroken away to show other parts hidden thereby.

More particularly:- The main body of the hook is a hollow cylinder 5,the interior walls of which are shown at a, having its upper end closedexcept for central hole 6 through which hauling cable 7 enters. On theinner end of cable 7 is fixed knob 8, preferably, in a manner disclosedin my Patent Number1,496,142, June 3, 1924. Hole 6 is smaller thanchamber 0, and knob 8 bears on the interior flange surrounding said holewhen cable 7 is under strain. The lower end of the hook body has twohori;

13 and a opposite each other.

and thusdisengaged from the hook. replace cable 11 in engagement withthe noon.

1924. Serial No. 726,410.

-zontal jawsi) and 7) which unite at 10 in the rear of the hook body.Said jaws are spaced apart at a wide enough to admit servicecable 11 toncentral position in chamber a, longitudinally. On the inner end of cable11 is fixed cable knob 12 which,

when said service cable is engaged by. the

.l iook,bears on top of jaws 9 and a when said cable is under operativestrain.

lower end in contact with the top surface of aws 9, b. In aws 9 and bare recesses recesses are housed keeper 14, dog 16 and spring 20. Recesse in jaw Z)? is only sufficient to house and provide a stop for the freeend or keeper lt when in operative position, while recess 13 hascapacity to house the pivoted end of keeper 1 1 and said dog and spring.Keeper 14: is pivoted by cap The 'i'rontof hook body 5 is open at enoughto permit knob 12 to enter chamber a with its In these screw 15 in jaw 9and can oscillate on its pivot from its full-line to its dotted-lineposition in Fig. 3. Dog 17 is'pivoted by cap; screw 17 in jaw 9 and hashit 18 and tail 19. and can oscillate from its full-line to itsdotted-line position in Fig. 3. When i in its full-line positionit isengaged with tooth o of keeper 14, and in its dotted-line position it isdisengaged from said keeper. Spring 20 reacts betweenjaw 9 and tail 19of dog 16 to maintain bit 18 engaged with tooth an. operative on tail 19will cause said dog to pass to its dotted-line position out ofengagement with keeper '14- Then if cable 11 is not undertoo greatstrain said cable and knob 12 can be removed from jaws-9, To

hook, it keeper 14 is closed, pressure on tail 19, as described willrelease said keeper and it can be swung on pivot 15 to its open positionat 1 1 when said cable and knob can be installed within the'hook andwith. the

closing of keeper 14-. are positively engaged distribution of the metalof the hook body for straiirresisting purposes. The absence ofobstructions on the upper surface of the Pressure from the finger of anjaws allows the engagement and disengagement of the hook without slackin the cables. The freedom of both cable attachments to the hook torevolve provides a swiveling feature that is very useful and is obtainedby simple means. In practice, operatives are well pleased with thedesign of this hook for'it dispenses with the need of spliced eyes atthe cable ends. These are always accompanied with protruding wire endswhich cause injury to the hands 01 said operatives. Furthermore theextreme lightness of this design provides a sufficiently strong hookthat is easily portable when used with cables one and one-half inches indiameter.

Having thus disclosed my invention, what I claim as new and desire tosecure by Letters Patent is,

1. In a logging hook in combination, a hollow hook body having means onits upper end for the attachment of a hauling cable thereto and havingan opening through its front wall near its lower end for the passage ofa service-cable knob therethrough, transverse jaws on the lower end ofsaid hook body having a slot therebetween adapted to receive a servicecable and having an upper surface adapted to seat said servicecableknob, and a removable keeper disposed in recesses in said jaws andadapted to bar said jaw slot in front of said service cable whereby saidservice cable is reinovably re tained between said jaws with saidservicecable knob on top thereof.

2. In a logging hook in combination, a hollow hook body having a holethrough its upper end, a hauling cable end inserted in said hole andprotruding within said hollow body, a cable knob fixed to said haulingcable end within said hollow hook body whereby said hauling cable ispositively ongaged with said hook body and free to revolve therein, twojaws on the lower end of said hook body spaced to receive a servicecable therebetween and having an upper surface adapted to seat a cableknob, a service cable having a cable knob fixed on the end thereofbetween said jaws with said knob bearing on top thereof, and a keeperremovably disposed as a bar across said jaws in front of said servicecable whereby said service cable is removably and positively engagedwith said hook body and free to revolve therein.

OSCAR A. \VIRKKALA.

